Massachusetts Curriculum Frameworks
MA.L.3. Grade 3 Language Standards [L]
Vocabulary Acquisition and Use
L.3.4. Determine or clarify the meaning of unknown and multiple-meaning words and phrases based on grade 3 reading and content, choosing flexibly from a range of strategies.
L.3.4.b. Determine the meaning of the new word formed when a known affix is added to a known word (e.g., agreeable/disagreeable, comfortable/uncomfortable, care/careless, heat/preheat).
L.3.4.c. Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., company, companion).